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20-428 Owner's Manual
2. Turn SQ fully counterclockwise, then turn SQ clockwise until the hissing sound stops.
3. To turn off the scanner, turn VOL counterclockwise to OFF.
Notes:
• The scanner does not scan if there are no frequencies stored in channels. If the scanner does not
scan and you have already stored frequencies in channels, turn SQ further clockwise.
• If the scanner picks up unwanted, partial, or very weak transmissions, turn SQ clockwise to
decrease the scanner's sensitivity to these signals. If you want to listen to a weak or distant station,
turn SQ counterclockwise.
• If SQ is adjusted so you always hear a hissing sound, the scanner will not scan properly.
• To ensure the scanner operates properly while in the trunking mode, we suggest you set SQ using
the steps listed above.
• If SQ is adjusted precisely at the threshold where the hissing sound stops, the radio will be most
sensitive to very weak signals. The radio may also receive unwanted noise or signals that are too
weak to understand. Most users prefer to position the squelch control a little bit past the point of
threshold to avoid receiving noise or signals that are too weak to understand.
storing known frequencies into channels
Good references for active frequencies are RadioShack's Police Call, Aeronautical Frequency
Directory, and Maritime Frequency Directory. We update these directories every year, so be sure to
get a current copy.
Follow these steps to store frequencies into channels.
Notes:
. If you are storing frequencies for an EDACS system, you must store them in order, with the first
frequency in channel 1 for the current bank. For example, if you want to store frequency of 150.0000,
150.0125, 150.0250, and 150.0375 MHz, you must store them in Channels 1, 2, 3, and 4 respectively.
. When M appears on the display, you can use FUNC and the arrow keys to select your desired bank
and channel number.
1. Press MAN, enter the bank (0-9) and channel number (00-99) where you want to store a frequency,
then press MAN again. M and the bank and channel number appear at the upper left corner of the
display (for example: M000).
Notes:
• Press FUNC. Then press /¥ or ¥/. The bank number moves in the direction of the arrow pressed.
• Press FUNC. Then hold down /¥ or ¥/. The bank number moves continuously in the assigned
direction.
• Press /¥. The channel number moves upward one by one. Or, press ¥/. The channel number moves
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